Slower performance with ext4

[Christopher Chan]

>> JFS seems to have the second best performance overall according to Bruce 
>> Guenter's maildir simulated local mail delivery benchmark. and it is 
>> stable too.
>>     
>
> JFS performs great in benchmarks, but back when I used to use it, I've
> consistently been able to bend it out of shape under real world
> conditions.. No data loss mind you, but damaged  meta data (fixed with
> jfs repair, but that should never be needed in a modern file system) and
> bizarre corner cases that caused performance to sink through the floor.


The benchmark that I looked at emulated real world conditions. Delivery 
to a maildir (fsbench). Not iffy benchmarks like hdparm or bonnie or 
postmark.